Disclosed are transport molecules that comprise a polypeptide comprising amino acid residues arranged in a sequence that is the reverse-sequence of basic portion of the HIV-TAT protein. The novel transport polypeptides are useful for transmembrane or intracellular delivery of cargo molecules, non-limiting examples of which include polypeptides and nucleic acids. The novel transport polypeptides may be covalently or non-covalenty bound to the cargo molecules.
